Utica Boilers CuB Series 安装指导
36
13 - TROUBLE SHOOTING
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In case of a boiler fault, the display will fl ash indicating the
fault code.
There are faults that cause permanent shutdown (marked with the letter “A”): to restore operation just press the RESET
button for 1 second or RESET; if the boiler fails to start, it is necessary to fi rst eliminate the fault.
Other faults (marked with the letter “F”) cause temporary shutdowns that are automatically reset as soon as the value
returns within the boiler’s normal working range.
Table of faults
- List of faults
Fault
code
code
Fault
Possible cause
Cure
A01
No burner ignition
No gas
Check the regular gas fl ow to the boiler and that the air has
been eliminated from the pipes
been eliminated from the pipes
Ignition/detection electrode fault
Check the wiring of the electrode and that it is correctly
positioned and free of any deposits
positioned and free of any deposits
Faulty gas valve
Check the gas valve and replace it is necessary
Ignition power too low
Adjust the ignition power
A02
Flame present signal with burner
off
off
Electrode fault
Check the ionisation electrode wiring
Card fault
Check the card
A03
Overtemperature protection
activation
activation
Heating sensor damaged
Check correct heating sensor positioning and operation
No water circulation in the system
Check the circulating pump
Air in the system
Vent the system
F05
The air pressure transducer does
not receive a suffi cient minimum
value within 25 seconds
not receive a suffi cient minimum
value within 25 seconds
Incorrect air pressure transducer wiring
Check the wiring
Flue not correctly sized or obstructed
Check the length of fl ue and that it is clean
A06
No fl ame after the ignition stage
Low pressure in the gas system
Check the gas pressure
Burner minimum pressure setting
Check the pressures
F10
Delivery sensor 1 fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
Wiring disconnected
F11
DHW sensor fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
Wiring disconnected
F14
Delivery sensor 2 fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
Wiring disconnected
A15
Air signal protection activation
Fault F05 generated 5 times in the last
15 minutes
15 minutes
See fault F05
F34
Supply voltage under 170V.
Electric mains trouble
Check the electrical system
F35
Faulty mains frequency
Electric mains trouble
Check the electrical system
F37
Incorrect system water pressure
Pressure too low
Fill the system
Sensor damaged
Check the sensor
F39
External probe fault
Probe damaged or wiring short circuit
Check the wiring or replace the sensor
Probe disconnected after activating the
sliding temperature
sliding temperature
Reconnect the external probe or disable the sliding
temperature
temperature
A41
Sensor positioning
Delivery sensor detached from the pipe
Check correct heating sensor positioning and operation
F42
Heating sensor fault
Sensor damaged
Replace the sensor
F43
Exchanger protection activation.
No system H
2
O circulation
Check the circulating pump
Air in the system
Vent the system
A44
DHW sensor disconnected
Sensor disconnected
Check the correct positioning and operation of the DHW
sensor.
sensor.
A48
Air signal protection activation
Fault F05 for 150 seconds
See Fault F05
F50
Modulation regulator fault
Wiring disconnected
Check the wiring
F51
Low water cutoff warning
Pressure too low
Fill the system
Low water cutoff damaged
Check the contact